Paper-perforating mechanism



Nov. 6, 1928.

D. W. HUDSON PAPER PERFORMING MECHANISM Filed Jan. 21, 1927 nlllllii'llllm j W J `INI/ENTOR.

BY Y

A TTORNEY.

Patented Non. d, Kidd@ STATES BAV?? WUJLIALEE HUBSN, QF GREEN BAY, WSCNSE'.

PIER-PEtFORATING MECHANISM.

Application led January 21, 1927.

This invention relates to improvements in paper perforating mechanism oi the type shown in Patent No. 1,509,838, ci September 30, 1224i. x

it is the object of the present invention to provide means for preventing the paper fromv being caught upon the perforating fingers shown in the patent above referred to.

In the drawings:

Figure 1 is a diagrammatic sectional view transversely through a machine embodying the present invention.

Figure 2 is a fra mentary detail view teiten in section in t e plane indicated at 2 in Figure 1 and showing in plan the mechanism which is added to the structure shown in the patent above referred to to satisfy the above specified object of this invention.

Like arts are identified by the same reference c aracters throughout the both views.

F or the purposes of the present disclosure the paper web 13 may be assumed to enter the machine about roller 15, from which it passes onto a die roll 16. This roli is peripherally grooved at 25, as disclosed in my previous patent, the purpose of the grooves being to receive the periorating knives carried by the companion roll 17. After being acted upon by the perorator the paper web 13 passes beneath a brush 18 and between creasing rolls 19 and 20, from which it is delivered for further treatment in the direction indicated by the arrow at 21.

' The skeleton roll 17 which carries the perforating mechanism is mounted on a shaft 28 and carries in its periphery a series of rock shafts 32 to which are secured arms carrying the blades 55 in which the perforating teeth or fingers 56 are formed. It will be understood that a perforating finger will register with each of the peripheral grooves 25 in the die roll 16.

It will be understood that in accordance with the disclosure of the former patent above referred to, the rock shafts 32 are successively oscillated in synchronism with the rotation of roll 17 to the end that as each set of perforating fingers approaches a position immediately beneath the die roll 16 it is impelled outwardly about the axis of rock shaft 32, whereb to penetrate the web of paper supported by the die roll. The

cam mechanism by which this oscillation of rock shafts 32 is preferably accomplished f ward folded Serial No. 162,453.

is not shown in this application for the reason that it is `fully disclosed in the aforesaid patent and is not essentiai to an understanding oiC the present invention.

1t will readily be understood that in the operation of the device shown in my previous patent the web of aper would be torn and wound upon cylin er 17 in the event that any of the perforating teeth or fingers caught in the web during their reti-active movement. In order to prevent this, I have added, in accordance with the present invention, a device which I call a comb and which is shown at 60 in the accompanying drawings.

Th comb comprises a piece of sheet metal riveted at 61 to an angle iron support 62 which extends longitudinally of the machine. The other side margin of the comb is smilarly secured at 63 to the longitudinally en tending angle iron support 65a carried by bracket G5.

Between its two supports the sheet of metal which comprises the comb 60 extends between die roll 16 and the skeleton roll 17 which carries the perforating mechanism. The intermediate portion of the comb is curved into general conformity with the cylindrical contour of roll 17.

The intermediate portion of the sheet metal comb is provided with parallel slots which register with and are adapted to receive the teeth 56 as such teeth are projected upwardly in the oscillatory movement of rock shafts 32 and arms 50. The advancing web, however, is confined between the unslotted portions oi the comb and the ungrooved portions 26 of the die roll. Consequently, when the perorating teeth 56 are withdrawn through slots 70 during the continued rotation of roll 17 and the continued advance of the web 13, the web will be supported by the comb and it will be impossible for the paper web to become wound upon roll 17 orto adhere to the individual teeth 56. The triangular tongues struck up by the perforating teeth tend to maintain a forward inclination as shown at 72, but are folded rearwardly when they encounter the brush 18 and are creased in their rearosition by rollers 19 and 20. It will be un erstood that in all particulars except the addition of comb 60 (and a slight change in the form of brush 18 as will be noted) this machine may be taken conform with the structure disclosed 1n my vprevious Patent No. 1,509,838. The comb 60 fully 'satisfies the purposes of this inven'- tion as. above expressed.

I claim:

1. In a vperforating machine, the combinar tion with a roll carrying outwardly movable perforating teeth, of a die roll having grooves complementary to said teeth and an intermediate comb between said rolls having slots extending in the direction of trav e1 of said teeth during the rotation of the roll upon which they are mounted, and intermediate unslotted rtions adapt/ed to supporta web upon w ich said teeth have acted. A

2. In a perforating mechanism, the combination with a roll and perforating teeth mounted thereon lfor outward movement during the rotation of said roll, of a die roll provided withgrooves adapted to receive said teeth, supports upon either side of said rolls, and a comb mounted on said supports and extending longitudinally of said rolls therebetween, said comb comprising a curved sheet of metal having slots in the direction of booth movement during the rotation of said first mentioned roll, and unslotted portions extending between said rolls and adapted to support a web upon which such teeth have acted.

pawn' WILLIAM HUDSON. 

